Manual or schematics of the Philips PE1648 DC supply - diyAudio
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Old 10th January 2012, 07:44 AM   #1
Elvee is offline Elvee  Belgium
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Default Manual or schematics of the Philips PE1648 DC supply

Hi everyone,

The title says it all: I am trying to fix this 150V - 3A variable supply, and some help from the documentation would be extremely helpful.
Thanks
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Old 12th January 2012, 05:33 PM   #2
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BAMA has a couple of Philips PE series manuals. Even though different models they might give you an idea how Philips does things. Myself I'd head straight for the series pass transistor(s).
Doc

http://bama.edebris.com/manuals/philips/
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Old 13th January 2012, 07:41 AM   #3
Elvee is offline Elvee  Belgium
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I have already looked up Bama's schematics, and none bear any resemblance with the 1648.
The problem(s) is in the control circuitry, both for the linear regulator and the thyristor pre-regulator: when I connect the thyristor's gates, the voltage across the main 5600µF/160V cap rises to 250V
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Old 13th January 2012, 12:30 PM   #4
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Quote:
Originally Posted by Elvee View Post
I have already looked up Bama's schematics, and none bear any resemblance with the 1648.
The problem(s) is in the control circuitry, both for the linear regulator and the thyristor pre-regulator: when I connect the thyristor's gates, the voltage across the main 5600µF/160V cap rises to 250V
Oh, one of "them". Best of luck to you. Sorrensen also used that scheme in some of theirs that were a bear to work on even with a schematic.
Doc
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